Cutting apparatus with trailing cut for mowing machines



o cti "1 926- D. STAUTER CUTTING APPARATUS WITH TRAILING CUT FOR MOWINGMACHINES Filed Dec. 30, 1924 for:

Jim

Patented Get. 26, 1926.

UNITED STATES DANIEL STAUTER, OF ZWEIBRUCKEN, GERMANY.

CUTTING APPARATUS WITH TBAILING OUT FOR MOWING IMACHINES.

Application filed December 30, 1924, Serial No. 758,930, and in GermanyJune 17, 1924.

This invention relates to a cutting ap par-atus designed for mowingmachines which is so constructed that it executes a long drawn cuttingaction and in which the leaf-shaped cutting knives oscillatable aroundguide studs, move to and fro between stationary rounded counter-cuttingedges so that the stalks are successively cut when the knives areclosing. A convenient number of knife blades are arranged on the cutterbeam and a reciprocating movement is communicated to the same by'aconnecting rod. The construction of the frame of t-he inowing machineand of the driving gear is supposed to be known and will not behereinafter described. The invention consists in mounting the knifelevers with ob ong guide slots on the pivot pin-s and in gaiding thedriving bar by means of links so that a forward and backward movement inlongitudinal direction is communicated to the knives, besides theoscillating movement.

On the accompanying drawing the construction of the cutting apparatus isillustrated by way of example.

Fig. 1 shows the arrangement of one pair of knives on the cutter beam.

Fig. 2 is a section on line AB of Fig. 1 showing also a cover plate andpressure bar.

The leaf-shaped knives a oscillate each around a guide stud m on which aroller m is mounted to protect the guide pin against wear. In order toobtain a long drawn out the knives are guided by slots 70 on their guidestuds m and behind the slots 7" the knives form each a lever p pivotallymounted on the bar it by means of pins. A reciprocating movement iscommunicated to bar h by means of links 7" pivotally mounted on thecutter beam 7. The counter knives 7) and the finger-knives c are fixedon the cutter beam 7 in one and the same plane. The cutting edges of theknives a, Z), c are chamfered as usual. The knives 0 are held at thefront ends by means of a nose on the fingers (Z. which are fixed on thelower surface of the cutter beam by means of flaps 0 Fig. 2). The bar itwhich is operated from the driving gear (not shown) through theintermediary of a crank rod is guided in clips 2'. A pressure bar 6which presses the knives a on the knives 7) and 0 serves at the sametime as holder and stiffening for the cover plate g (Fig. 2) which isfixed by means of hinges so that it can be lifted and lowered. i

The cutting apparatus. presents in comparison with the commonly usedcutting apparatus the advantage that a considerable economy of power isobtained owing to. the long drawn cut. Owing to the fact that the knivesdo not execute at one revolution of the crank shaft two comparativelyshort cuts as hitherto, but four the length of cut in forward directionbecomes much longer, wherefrom results again a diminution of the numberof revolutions and of the wear of the driving elements.

I claim A cutting apparatus for mowing machines comprising incombination with the driving mechanism, a cutter beam, studs fixed onsaid cutter beam, a shifting bar movably mounted on said cutter beam,links fixed at one end on said cutter beam and at the other end on saidshifting bar, leaf shaped movable knives pivotally mounted at the upperend on said shifting bar and having each an oblong slot engaging overone of said studs on the cutter beam, and twice as many stationaryknives as movable knives fixed on said cutter beam underneath saidmovable knives and having each two cutting edges so that in mowing thecutting edges of each movable knife co-operate with four count-ercutting edges.

In testimony whereof I aliix my signature.

DANIEL STAUTER.

